Apparatus for rolling internally flanged annuli



Jan. 5, 1943. D. s. BELL ETAL 0 APPARATUS FOR ROLLING INTERNALLY FLANGED ANNULI Original Filed Dec. 14, 1938 2 Sheets-Sheet 1 lllll All I fillllf I INVENTOR 5 Dav/lift S. 15 all and Byron WI/Lmham l MdMJZ M Jan. 5, 1943.

D. s. BELL ETAL 2,307,191 APPARATUS FOR ROLLING INTERNALLY FLANGED ANNULI Original Filed Dec. 14, 1938 2 Sheets-Sheet 2 Patented Jan. 5, 1943 UNITED I STATES 2,307,191 APPARATUS FOR ROLLING INTEBNALLY ANNULI FLAN GED Davitt S. Bell, Pittsburgh, and Byron W. Dunham, Oakmont, Steel Corporation, of Pennsylvania Pa., assignors to Edgewater Oakmont, Pa., a corporation Original application December 14, 1938, Serial No. 245,634. Divided and this application July 25,

1941, Serial No. 404,032

4 Claims.

This invention is for an apparatus for rolling annuli which have internally projecting flanges thereon. The present invention is for an improvement in machines of the general type disclosed in United States Patent No. 1,350,057, 5 granted August 17, 1920, to F. B. Bell, and this application constitutes a division of our copending application Serial No. 245,634, filed December 14, 1938, now Patent No. 2,280,783. While ring mills have heretofore been extensively used in the rolling of annuli of various cross sections, annuli which are internally flanged have, prior to the present invention, been produced largely by die-forging operations. Some success has heretofore been achieved through the use of ring mills but because of peculiar conditions which ar enpierced bloom from its original form to an internally flanged ring of many times the diameter of the original blank, ring mills as heretofore designed have not been well adapted to the purpose.

The present invention provides a ring mill specially adapted for the rolling of internally flanged annuli. It provides a mill of this character in which two separate rolling operations are carried on at the same time so as to properly correlate the elongation of the peripheral portion of the blank to the elongation of the portion of the blank which forms the internal flange. In common with other rolling mills of this general character, the apparatus comprises a main roll whose position is fixed and which bears against the periphery of the blank. Cooperating directly with the main roll is a pressure roll which is movable radially toward or away from the main roll. One roll pass is provided between the main roll and the pressure roll. Cooperating with the main roll and the pressure roll but positioned for adjustment independently thereof is a carriage which is movable toward and away from the main is movable rectilinearly toward 4? and away from the other edging roll. Provided reference to the accompanying drawings, in which Figure l is a more or less schematic view showing a side elevation of the roller arrangement of the ring mill constituting the present invention;

Figure 2 is a top elevation of shown in Figure 1;

Figure 3 is a view showing a typical blank or which it is originally made the arrangement bloom in the form in up for reduction in the mill;

Figure 4 is a similar view of the completed blank;

Figure 5 is a longitudinal section showing more or less schematically the complete ring mill construction; and

Figure 6 is a detail view showing an elevation of the arbor and support for the upper edging roll of the ring mill shown in Figure 5.

First referring to Figures 1 and 2, the apparatus employed comprises a. power-driven main roll 2 adapted to bear against the periphery of the bloom or blank. Cooperating directly with the main roll 2 is a pressure roll 3. The pressure roll 3 is supported for movement in a direction toward or away from the main roll .2 as indicated by the double-ended arrow in Figures 1 and 2. The roll pass and the pressure roll of the dimension F of Figure 3 to the dimension creases. Equidistantly spaced to each side of the edging rolls 4 and 5 are pressure rolls 6 and l roll which we designate as wheel rolls and which bear against the periphery of the blank. As will hereinafter more fully appear, the wheel rolls are mounted on the same carriage as the edging rolls 4 and 5 so that they may be moved toward and away from the main roll 2. In addition to this they are mounted so that they can be moved in the direction of the arrows of Figure 2 toward and away from the working portions of the edging rolls. It is through the manipulation of the wheel rolls 6 and 1 toward the shouldered terminal portions of the edging rolls 4 and 5 that the change of dimension A in Figure 3 to A in Figure 4 is effected. The combination of edging and wheel rolls effects reduction in a radial direction in that portion of the blank above and below the plane of the flange. Furthermore, the upper edging roll 4 is mounted for rectilinear vertical movement toward and away from the lower edging roll. It is through this vertical relative movement that the dimension B of Figure 3 to the dimension B7 in Figure 4 is effected, and dimension C in Figure 3 is reduced to C in'Figure 4. dimension C being the thickness of the flange. Through the joint manipulation and action of all of the rolls, the over-all dimension of the blank of Figure 3 is extended to X of Figure 4 and the internal diameter, dimension Y in Figure 3, is extended to Y in Figure 4.

In addition to the various rolls mentioned, the ring mill also has guide rolls 8 and 9 which are best shown in Figure 2 and which bear against the periphery of the blank and which function to keep the blank in a truly circular shape as it is rolled. The guide rolls for movement in an arbor as arrows in Figure 2.

The machine itself comprises a stationary frame member providing bearings for a vertical shaft H on which the main work roll 2 is mounted. A motor i2 is provided for driving the main work roll. The machine has a horizontally extending bed i3. Supported on the bed I3 is a slidable stand l4 having a vertical spindle thereon which carries the pressure roll 3, the pressure 3 having a diameter smaller than the diameter of the main roll 2. Connected to the stand II is a pull rod l5 whose other end is connected to a cross-head [6. This cross-head has pistons which operate stationary hydraulic cylinders l6 which cylinders are mounted on the stationary frame Ill. The arrangement is such that when the cylinders I6 are operated the slide l4 may be moved back and forth for moving the pressure roll 3 toward the main roll 2.

Also mounted on the bed 13 for movement therealong is a carriage II. This carriage has a vertically extending arbor I8 at its forward end. Mounted in the arbor is a cross-head I9 having a vertical piston 20. A vertically movable slide 2| is slidably supported by the arbor and it is provided with a vertical cylinder 22 which cooperates with the piston 20, the piston 20 being flxed and the cylinder being movable. Pivotally suspended from the lower end of the slide 2| is a 8 and 9 are supported indicated by the i this piston being designated bracket 23 on which is mounted a supporting plate 24. The supporting plate 24 has a motor 25 thereon. The motor 25 drives a shaft 26 and on the lower free end of the shaft 26 is the upper edging roll 4. A screw adjustment 21 enables the motor with the shaft 26 to be moved in the direction of the axis of the shaft to advance or retract the upper edging roll.

The supporting plate 24 is suspended from a yoke 26. The upper part of this yoke in the form of a threaded extension which passes through a guide block 29 on an arm 30, projecting upwardly and rearwardly from the slidable cross-head 2|. A hand wheel on the upper end of this threaded extension enables the yoke to be raised or lowered to adjust the angularity of the support 24 and the shaft 26.

Supported on the cross-head i9 is an upwardly extending cylinder 3|. A piston, supported by pull-back rods 32, operates in the cylinder 3|, 1

32'. The cylinder 3| in the piston 32' constitutes 'a pull-back mechanism for lifting the slide 2| and the mechanism suspended therefrom, while the cylinder 22 constitutes means for applying downward pressure to the upper edging roll during the rolling operation.

This construction enables the upper edging roll to be moved up and down in a vertically rectilinear direction. As the same time the angles of the upper edging roll may be adjusted for any particular rolling operation or for any particular shape of upper edging roll 4.

The carriage I1 is also provided with an inclined support H for a motor 33 which drives shaft So on the upper terminal of which is mounted the lower edging roll 5. A screw mechanism 34 enables the motor 33 in the shaft 5a to be adjusted in an axial direction.

The carriage l1. also supports a flxed horizontal cylinder 35 which operates a piston rod 36. On the forward end of the piston rod 36 is a yoke 31. This yoke, which extends transversely to each side of the piston rod 36, provides a support for the wheel rolls 6 and I. In conjunction with the cylinder 35 there is a pull-back cylinder 38. By the introduction of fluid into the cylinder 36 the piston 36 may be moved relatively to the carriage to determine the position of the wheel rolls 6 and l with relation to the edging rolls 4 and 5. The pull-back cylinder 38 provides for retracting the wheel rolls 6 and I from an operating position.

The whole carriage I1 is, during the operation of rolling, gradually moved away from the main roll 2. For effecting this operation of the carriage we may provide a fluid pressure cylinder 39 having a piston with a piston rod 40. A forward end of the piston rod 40 is connected with the carrlage II. The construction is such that by operation of the cylinder the carriage H can be reciprocated along the bed of the machine.

We have illustrated the entire mechanism in a simple and schematic form to illustrate in a simple manner the important features of novelty in the machine and various changes may, from an engineering standpoint, be made in the construction of various parts. An important difference between the present invention and the construction shown in the said patent to F. B. Bell No.

1,315,057 is the provision of means for moving the upper edging roll 4 up and down in a direction parallel with the axis of the main roll 2. This rectilinearly vertical movement of the upper edging roll with respect to important advantage in annulus. A further important difference is the fact that the upper edging roll, in addition to being movable up and down in a direction parallel with the axis of the main roll, may also be adjusted to a 'desired angular inclination and retained at this inclination so long as desirable through the rolling operation. By having the upper edging roll move vertically relatively to the lower one, the reduction in the piece being rolled caused by the upper roll being moved down occurs the rolling of a flanged the lower one provides an I at a controlled and uniform rate whereas in an with respect to the other roll in a direction parapparatus as disclosed in the said prior Bell patallel with the axis of the main roll whereby the ent where the upper edging roll moves through angularity of the rolls remains constant as one an arc unequal reduction occurs by reason of the is moved relatively to the other. are travel of the upper edging roll. 5 2. A ring mill for rolling internally flange In the operation of the machine the blank annuli having a main roll and a pressure roll shown in Figure 3 is placed between the main one of which is movable toward and away from roll 2 and the pressure roll 3 with the pressure the other, and having edging rolls with oppositev roll projecting through the opening in the cenly inclined axes and which are necked-in to proter of the blank. At this time the carriage I1 is vide two intersecting rolling faces on each roll, in a position where the bottom face of the blank and means for moving one of the edging rolls will rest on and be supported by the lower work during the rolling operation in a straight line roll 5. As the reduction of metal takes place, with respect to the other roll in a direction parcausing the diameter of the blank to be extended, allel with the axis of the main roll whereby the the carriage I1 is moved to the right as viewed in angularity of the rolls remains constant as one Figure 5 away from the main roll. In the operais moved relatively to the other, and other means tion of rolling the reduction of the rim portion for adjustably varyi g the angularity Of One Of of the blank is accomplished by causing the wheel the rolls with respect to the other. rolls 6 and I to move toward the edging rolls as 3. A ring rol ing mill for the ol ng of viewed in Figures 2 and 5, even though the carternally flan ed annu i mp is n a v rt cal riage I! as a unit is, at the same time, moving main roll, a vertical cylindrical pressure roll coaway from the main roll 2. R du ti n of th operating with the main roll, the main roll and rim portion as well as reduction of the flange is the pressure r0 1 f g p s for reducing the also accomplished by vertical movement of the Section being rolled in the plane of t flange of upper edging roll toward the lower edging roll the annulus only, and a carriage movable horithe annulus, i. e., the dimension F of Figure 3 h r z ntal p n and an upper ed in roll whos and F of Figure 4 is effected through the move- 3 axis is inclined in an opposite direction to that ment of the pressure roll 3 toward the main roll of the lower edging r011 80 t the project on of 2. this being accomplished by causing the stand its axis intercepts the projection of. the axis of M to be moved to the left as viewed in Figure 5. the lower edging roll, t e upper edging roll be- Thus, in carrying out the operation of rolling ing shouldered to provide conical surfaces which an internally flanged bla k, one u pass e" bear against the flange and the edge of the andetermined by th v t of the upper edging ward and away from the lower edging roll upon the flange L e" the dimension A of Figure 3 wheel rolls on the carriage adjacent the edging and of Figure 4 is determined by the mam-pm rolls and movable in a horizontal plane relatively lation of the wheel rolls 6 and 1 with reference the edging to the shouldered edging mus 4 and The 4. Aring rollingmill for the rolling of internalthree separate adjustments of the rolls are coflanged annuh comprising a vertical main a t of each section of the blank. sure roll forming a pass for reducing the section In the drawings we have illustrated the jnvem being rolled in the plane of the flange of the tion as applied to the mmng f an annulus of a annulus only, and a carriage movable horizontalgenerally T-shaped cross section in which the W towardP'nd away from the m 111, Said leg of the T constitutes the internally projecting hiwmg a edging r011 thereon flange. By proper selection of the edging u h ving its axis inclined to a vertical and horior of other rolls the mechanism may also be used p f'" and an P edging mu whose axis changes and modifications may be made in the o0 shouldered to provide conical surfaces which bear of the following 1 1 ease the inner face of the annulus between the We claim: z al the edge, a vertcally movable sup- A m m for rolling internan ed 65 no on e carriage mova le rectilinearly tom having a mam roll and a g fggi ward and away from the lower edging roll upon portion providing intersecting horizontally and the edging rolls and movable in a horizontal vertically extending rolling faces on each roll. plane relatively to the edging and means for moving one of the edging rolls AM during the rolling operation in a straight line BYRON D 

